how many seasons has dirk nowitzki played

Dirk Nowitzki played 21 years in his career.

	NAME	SEAS	SEASON	TM	GP	MPG	PPG	RPG	APG	SPG	BPG	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TPG	MIN	PTS	REB	AST	STL	BLK	TOV	PF	+/-
1	Dirk Nowitzki D. Nowitzki	1	1998-99	DAL	47	20.4	8.2	3.4	1.0	0.6	0.6	2.9	7.1	40.5	0.3	1.4	20.6	2.1	2.7	77.3	49.1	0.9	2.6	1.6	958	385	162	47	29	27	73	105	-17
2	Dirk Nowitzki D. Nowitzki	1	1999-00	DAL	82	35.8	17.5	6.5	2.5	0.8	0.8	6.3	13.6	46.1	1.4	3.7	37.9	3.5	4.2	83.0	56.4	1.2	5.2	1.7	2,938	1,435	532	203	63	68	141	256	+92
3	Dirk Nowitzki D. Nowitzki	1	2000-01	DAL	82	38.1	21.8	9.2	2.1	1.0	1.2	7.2	15.2	47.4	1.8	4.8	38.7	5.5	6.6	83.8	60.1	1.5	7.7	1.9	3,125	1,784	754	173	79	101	156	245	+532
4	Dirk Nowitzki D. Nowitzki	1	2001-02	DAL	76	38.0	23.4	9.9	2.4	1.1	1.0	7.9	16.6	47.7	1.8	4.6	39.7	5.8	6.8	85.3	59.9	1.6	8.4	1.9	2,891	1,779	755	186	83	77	145	222	+411
5	Dirk Nowitzki D. Nowitzki	1	2002-03	DAL	80	39.0	25.1	9.9	3.0	1.4	1.0	8.6	18.6	46.3	1.9	4.9	37.9	6.0	6.9	88.1	58.1	1.0	8.9	1.9	3,117	2,011	791	239	111	82	152	206	+778
6	Dirk Nowitzki D. Nowitzki	1	2003-04	DAL	77	37.9	21.8	8.7	2.7	1.2	1.4	7.9	17.0	46.2	1.3	3.8	34.1	4.8	5.5	87.7	56.1	1.2	7.5	1.8	2,915	1,680	670	207	92	104	135	216	+406
7	Dirk Nowitzki D. Nowitzki	1	2004-05	DAL	78	38.7	26.1	9.7	3.1	1.2	1.5	8.5	18.5	45.9	1.2	2.9	39.9	7.9	9.1	86.9	57.8	1.2	8.5	2.3	3,020	2,032	757	240	97	119	176	219	+586
8	Dirk Nowitzki D. Nowitzki	1	2005-06	DAL	81	38.1	26.6	9.0	2.8	0.7	1.0	9.3	19.3	48.0	1.4	3.3	40.6	6.7	7.4	90.1	58.9	1.4	7.6	1.9	3,089	2,151	728	226	58	83	156	164	+509
9	Dirk Nowitzki D. Nowitzki	1	2006-07	DAL	78	36.2	24.6	8.9	3.4	0.7	0.8	8.6	17.2	50.2	0.9	2.2	41.6	6.4	7.1	90.4	60.5	1.6	7.3	2.1	2,820	1,916	693	263	52	62	167	171	+623
10	Dirk Nowitzki D. Nowitzki	1	2007-08	DAL	77	36.0	23.6	8.6	3.5	0.7	0.9	8.2	17.1	47.9	1.0	2.9	35.9	6.2	7.1	87.9	58.5	1.2	7.3	2.1	2,769	1,817	659	266	51	71	160	198	+482
11	Dirk Nowitzki D. Nowitzki	1	2008-09	DAL	81	37.7	25.9	8.4	2.4	0.8	0.8	9.6	20.0	47.9	0.8	2.1	35.9	6.0	6.7	89.0	56.4	1.1	7.3	1.9	3,050	2,094	681	197	61	63	157	176	+246
12	Dirk Nowitzki D. Nowitzki	1	2009-10	DAL	81	37.5	25.0	7.7	2.7	0.9	1.0	8.9	18.5	48.1	0.6	1.5	42.1	6.6	7.2	91.5	57.8	1.0	6.7	1.8	3,039	2,027	620	218	70	79	149	208	+349
13	Dirk Nowitzki D. Nowitzki	1	2010-11	DAL	73	34.3	23.0	7.0	2.6	0.5	0.6	8.4	16.2	51.7	0.9	2.3	39.3	5.4	6.1	89.2	61.2	0.7	6.3	1.9	2,504	1,681	513	190	38	47	137	172	+541
14	Dirk Nowitzki D. Nowitzki	1	2011-12	DAL	62	33.5	21.6	6.7	2.2	0.7	0.5	7.6	16.7	45.7	1.3	3.4	36.8	5.1	5.7	89.6	56.4	0.7	6.0	1.9	2,079	1,342	418	136	42	30	117	129	+261
15	Dirk Nowitzki D. Nowitzki	1	2012-13	DAL	53	31.3	17.3	6.8	2.5	0.7	0.7	6.5	13.7	47.1	1.2	3.0	41.4	3.1	3.6	86.0	56.4	0.7	6.2	1.3	1,661	917	363	132	38	37	70	93	+58
16	Dirk Nowitzki D. Nowitzki	1	2013-14	DAL	80	32.9	21.7	6.2	2.7	0.9	0.6	7.9	15.9	49.7	1.6	4.1	39.8	4.2	4.7	89.9	60.3	0.5	5.7	1.5	2,628	1,735	498	216	73	45	117	165	+323
17	Dirk Nowitzki D. Nowitzki	1	2014-15	DAL	77	29.6	17.3	5.9	1.9	0.5	0.4	6.3	13.8	45.9	1.4	3.6	38.0	3.3	3.8	88.2	56.0	0.6	5.4	1.1	2,282	1,333	457	143	39	33	82	160	+240
18	Dirk Nowitzki D. Nowitzki	1	2015-16	DAL	75	31.5	18.3	6.5	1.8	0.7	0.7	6.6	14.8	44.8	1.7	4.6	36.8	3.3	3.7	89.3	55.5	0.7	5.8	1.1	2,364	1,372	489	132	52	52	84	161	+257
19	Dirk Nowitzki D. Nowitzki	1	2016-17	DAL	54	26.4	14.2	6.5	1.5	0.6	0.7	5.5	12.6	43.7	1.5	3.9	37.8	1.8	2.1	87.5	52.9	0.4	6.1	0.9	1,424	769	353	82	30	38	51	113	-14
20	Dirk Nowitzki D. Nowitzki	1	2017-18	DAL	77	24.7	12.0	5.7	1.6	0.6	0.6	4.5	9.8	45.6	1.8	4.4	40.9	1.3	1.4	89.8	57.5	0.3	5.4	0.7	1,900	927	438	120	43	45	51	146	-55
21	Dirk Nowitzki D. Nowitzki	1	2018-19	DAL	51	15.6	7.3	3.1	0.7	0.2	0.4	2.6	7.4	35.9	1.3	4.0	31.2	0.8	1.0	78.0	46.9	0.1	3.0	0.4	795	373	158	35	9	18	18	76	-67
	Average	1.0			72.5	33.8	20.7	7.5	2.4	0.8	0.8	7.3	15.6	47.1	1.3	3.4	38.0	4.8	5.4	87.9	57.7	1.0	6.6	1.6	2446.1	1502.9	547.1	173.9	57.6	61.0	118.8	171.5	311.5
	Total	21			1,522	33.8	20.7	7.5	2.4	0.8	0.8	7.3	15.6	47.1	1.3	3.4	38.0	4.8	5.4	87.9	57.7	1.0	6.6	1.6	51,368	31,560	11,489	3,651	1,210	1,281	2,494	3,601	+6541